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INFLUENCE OF MEASUREMENT EQUIPMENT ON THE UNCERTAINTY OF PERFORMANCE DATA FROM TEST LOOPS FOR CONCENTRATING SOLAR COLLECTORS

Lüpfert, Eckhard und Pitz-Paal, R. und Pottler, Klaus und Eck, Markus und Zarza, E. und Riffelmann, K.-J. (2010) INFLUENCE OF MEASUREMENT EQUIPMENT ON THE UNCERTAINTY OF PERFORMANCE DATA FROM TEST LOOPS FOR CONCENTRATING SOLAR COLLECTORS. Journal of Solar Energy Engineering, 132 (3). American Society of Mechanical Engineers. DOI: 10.1115/1.4001476. ISSN 0199-6231.

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Kurzfassung

Parabolic trough concentrating collectors play a major role in the energy efficiency and economics of concentrating solar power plants. Therefore, existing collector systems are constantly enhanced and new types developed. Thermal performance testing is one step generally required in the course of their testing and qualification. For outdoor tests of prototypes a heat transfer fluid loop (single collector or entire loop) needs to be equipped with measurement sensors for inlet, outlet and ambient temperature as well as irradiance, wind speed and mass or volumetric flow rate to evaluate the heat balance. Assessing the individual measurement uncertainties and their impact on the combined uncertainty of the desired measurement quantity one obtains the significance of the testing results. The method has been applied to a set of EuroTrough collector tests performed at Plataforma Solar de Almería (PSA). Test results include the uncertainty range of the resulting modeling function and exemplify the effects of sensors and their specifications on the parameters leading to an uncertainty of ±1.7%-points for the optical collector efficiency. Measurement uncertainties of direct normal irradiance and mass flow rate are identified as determining uncertainty contributions and indicate room for improvement. Extended multiple sensor deployment and improved calibration procedures are the key to further reducing measurement uncertainty and hence increasing testing significance.

Dokumentart:Zeitschriftenbeitrag
Titel:INFLUENCE OF MEASUREMENT EQUIPMENT ON THE UNCERTAINTY OF PERFORMANCE DATA FROM TEST LOOPS FOR CONCENTRATING SOLAR COLLECTORS
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Lüpfert, EckhardNICHT SPEZIFIZIERT
Pitz-Paal, R.NICHT SPEZIFIZIERT
Pottler, KlausNICHT SPEZIFIZIERT
Eck, MarkusNICHT SPEZIFIZIERT
Zarza, E.CIEMAT
Riffelmann, K.-J.NICHT SPEZIFIZIERT
Datum:August 2010
Erschienen in:Journal of Solar Energy Engineering
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:132
DOI :10.1115/1.4001476
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Flamant, GillesNICHT SPEZIFIZIERT
Verlag:American Society of Mechanical Engineers
ISSN:0199-6231
Status:veröffentlicht
Stichwörter:parabolic trough, extended prototype testing, efficiency, thermal measurement, measurement uncertainty, combined uncertainty, qualification
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Qualifizierung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Technische Thermodynamik > Solarforschung
Hinterlegt von: Nicole Janotte
Hinterlegt am:21 Jan 2011 15:27
Letzte Änderung:04 Apr 2013 16:27

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